I live within half a mile from downtown and drive downtown frequently for Uber/Lyft (or myself) and I hate them. They drive stupid and their shit's all regarded. You're right, they are similar to cyclists. But these are the same reason I hate cyclists who don't know wtf they're doing. I actually appreciate when a scooterist uses the bike lane and controls themselves. When they don't, I hope that they diascooterf. There are a significant amount of scooterists who don't know or care about wtf they're doing, thus, the reaction.
Honestly I drive under the assumption that all other drivers are idiots, which keeps me safer, so it's not much of a change. But the part that pisses me off is that when you drive a car like an idiot we might dent each other's cars and be in for a headache/$$, ride a bike/scooter like an idiot and the idiot is dead and/or in the hospital and that's a much bigger ordeal. The stakes are higher, so I wish they would use the scooters/bikes with the appropriate amount of discretion, but a lot of times they don't, so I react with my own discretion.